I just saw this thread, Chris, but Greg's description is almost exactly what I did for my Leyburn time lapse - with the same Canon 14 mm f/2.8L II you're talking about. I only occasionally dabble in time lapses, so I'm certainly no expert.
The only difference to Greg's workflow is that I used QuickTime Pro to convert stills to a movie (I already had it; I wouldn't recommend buying it just for that feature). VirtualDub is a free tool that can do it.
LRTimeLapse (commercial) is used by a few people on here; might be worth looking into.
http://timelapseblog.com/2009/08/04/...or-time-lapse/
Only other thing is that I always leave the WB on Auto in camera and shoot in RAW. If the sky colour changes a lot during the night (e.g waves of airglow come and go), I find that Auto gives more pleasing results. Custom/manual WB is more reliable if you have lots of artificial colours - e.g. foreground lights - that throws off Auto WB.